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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '450a16989cb30b6f040e0a1a7a213ce347c4f39d3a82702173f45158f4de702e' 
  AND token = 'ZYqGKKedZY6h7Y1/MHuWyKj8IahddOIyh0QCERM5l1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}